A high-performance oil seal

Abstract

This application relates to the technical field of sealing components and discloses a high-performance oil seal, which includes an outer skeleton and an inner skeleton. The outer skeleton is fixedly connected to the inner skeleton, and the inner skeleton abuts against the crankshaft. Both the outer skeleton and the inner skeleton are provided with sealing components. The inner skeleton is provided with a lip, which is fixedly connected to the sealing component on the outer skeleton. The sealing component has an arc surface with a wavy shape. This application increases the contact area between the sealing component and the crankshaft, and the wavy arc surface can fit more tightly with the crankshaft, thereby enhancing the sealing performance of the crankshaft front oil seal, reducing the possibility of oil leakage from the crankshaft end, and allowing the car engine to run more stably.

Description

Technical Field

[0001] This application relates to the technical field of sealing components, and in particular to a high-performance oil seal. Background Technology

[0002] The crankshaft front oil seal is a very important sealing component in a car engine. It is usually installed at the front of the engine, that is, next to the crankshaft and the engine pulley or sprocket. Its main function is to prevent oil leakage and protect the internal environment of the engine.

[0003] In related technologies, an oil seal includes an outer skeleton and an inner skeleton. The outer skeleton is fixedly connected to the inner skeleton, and the inner skeleton abuts against the crankshaft. Both the outer skeleton and the inner skeleton are provided with sealing elements. The inner skeleton is provided with a lip, and the lip is fixedly connected to the sealing element on the outer skeleton.

[0004] Traditional oil seals typically have smooth surfaces and are sealed by tightly contacting the crankshaft. However, due to the large circumferential movement of the crankshaft during rotation, the contact surface between the seal and the crankshaft is prone to wear, leading to reduced sealing performance and causing oil leakage from the crankshaft end. Utility Model Content

[0005] To improve the sealing performance of oil seals, this application provides a high-performance oil seal.

[0006] This application provides a high-performance oil seal, which adopts the following technical solution: A high-performance oil seal includes an outer skeleton and an inner skeleton. The outer skeleton is fixedly connected to the inner skeleton, and the inner skeleton abuts against a crankshaft. Both the outer skeleton and the inner skeleton are provided with sealing elements. The inner skeleton is provided with a lip, and the lip is fixedly connected to the sealing element on the outer skeleton. The sealing element has an arc surface, and the arc surface is wavy.

[0007] By adopting the above technical solution, the contact area between the seal and the crankshaft is increased by the wavy arc surface on the seal. The wavy arc surface can fit more tightly with the crankshaft, thereby enhancing the sealing performance of the crankshaft front oil seal, reducing the possibility of oil leakage from the crankshaft end, and allowing the car engine to run more stably.

[0008] Optionally, the sealing element is provided with an elastic limiting member, and the inner skeleton is provided with a limiting hole for the limiting member to be inserted; when the limiting member is inserted into the limiting hole, the limiting member abuts against the surface of the inner skeleton near the lip.

[0009] By adopting the above technical solution, when the limiting member is inserted into the limiting hole, it abuts against the surface of the inner skeleton near the lip, so that the limiting member can be fixed between the inner skeleton and the lip. When the contact surface between the seal and the crankshaft is worn due to long-term friction, the operator can remove the seal from the inner skeleton and replace it with a new seal, which provides convenience for the operator in the process of replacing the seal.

[0010] Optionally, a first inclined surface is provided on the groove wall of the limiting hole, and the distance from the first inclined surface to the limiting member gradually decreases along the direction in which the limiting member is inserted into the limiting hole. The first inclined surface is used to guide the limiting member to be inserted into the limiting hole.

[0011] By adopting the above technical solution, the distance from the first inclined surface to the limiting member gradually decreases along the direction in which the limiting member is inserted into the limiting hole, so that the limiting member can be inserted into the limiting hole along the inclined direction of the first inclined surface, making it convenient for the staff to insert the limiting member into the limiting hole to achieve the fixation between the sealing member and the inner skeleton.

[0012] Optionally, a groove is provided on the wall of the limiting hole, and the groove extends through the surface of the inner skeleton near the lip piece. The groove is used to provide deformation space for the limiting member.

[0013] By adopting the above technical solution, the groove penetrates the surface of the inner skeleton near the lip, so that the groove can provide space for the deformation of the limiting component, allowing the limiting component to unfold and reset more smoothly after being inserted into the limiting hole.

[0014] Optionally, the lip is provided with a limiting block, the limiting block is elastic, and the limiting block is located on the moving path of the limiting member; when the limiting member is inserted into the limiting hole, the limiting block abuts against the surface of the limiting member away from the crankshaft, and the limiting block is in a deformed state.

[0015] By adopting the above technical solution, when the limiting member is inserted into the limiting hole, the limiting block abuts against the surface of the limiting member away from the crankshaft, and the limiting block is in a deformed state, so that the limiting block can apply a force away from the lip plate to the limiting member, so that the limiting member is fixed between the limiting block and the inner skeleton, reducing the possibility of the limiting member coming out of the limiting hole, thereby enhancing the stability of the overall structure of the crankshaft front oil seal.

[0016] Optionally, the lip is provided with a locking block, which abuts against the surface of the limiting block near the axis of the inner skeleton.

[0017] By adopting the above technical solution, the card block abuts against the surface of the limiting block near the axis of the inner skeleton, so that the card block can restrict the movement of the limiting block in the direction of the inner skeleton axis, allowing the limiting block to better abut against the limiting component.

[0018] Optionally, the limiting member is provided with a second inclined surface, the distance from the second inclined surface to the lip gradually increases along the direction of the limiting member near the inner skeleton axis, and the second inclined surface is used to guide the limiting block to move to the surface of the limiting member near the lip.

[0019] By adopting the above technical solution, the distance from the second inclined surface to the lip gradually increases along the direction of the limiting member close to the inner skeleton axis, so that the limiting block can move more smoothly along the inclined direction of the second inclined surface to the surface of the limiting member close to the lip, thereby allowing the limiting block to stably fix the limiting member.

[0020] Optionally, the limiting member has friction texture on its surface near the lip, and the friction texture is used to limit the movement of the limiting block.

[0021] By adopting the above technical solution, friction texture is formed on the surface of the limiting member near the lip, which increases the surface friction of the limiting member near the lip and reduces the possibility of the limiting block moving, thereby allowing the limiting block to fix the limiting member to the inner frame more stably.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. By creating a wavy arc surface on the seal, the contact area between the seal and the crankshaft is increased. The wavy arc surface can fit more tightly with the crankshaft, thereby enhancing the sealing performance of the crankshaft front oil seal, reducing the possibility of oil leakage from the crankshaft end, and allowing the car engine to run more stably.

[0023] 2. When the limiting component is inserted into the limiting hole, it abuts against the surface of the inner skeleton near the lip, thus fixing the limiting component between the inner skeleton and the lip. When the contact surface between the seal and the crankshaft wears due to long-term friction, the operator can remove the seal from the inner skeleton and replace it with a new one, providing convenience for the operator in the process of replacing the seal. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of Example 1; Figure 2 It is Example 1 Figure 1 A partial sectional view along line AA; Figure 3 This is a structural schematic diagram of Example 2; Figure 4 It is Example 2 Figure 3 A partial sectional view along line BB.

[0025] Reference numerals: 1. Outer frame; 2. Inner frame; 21. Lip; 211. Limiting block; 212. Locking block; 22. Limiting hole; 221. First inclined surface; 222. Groove; 3. Sealing element; 31. Arc surface; 32. Limiting element; 321. Second inclined surface; 322. Friction pattern. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0027] Example 1 This embodiment discloses a high-performance oil seal. (Refer to...) Figure 1 and Figure 2 A high-performance oil seal includes an outer skeleton 1 and an inner skeleton 2, with the outer skeleton 1 fixedly connected to the inner skeleton 2. A sealing element 3 is fixedly connected to both the outer skeleton 1 and the inner skeleton 2. The sealing element 3 is made of rubber, which is formed by one-time extrusion foaming using a microwave vulcanization process, resulting in a smooth and aesthetically pleasing surface with good elasticity and resistance to compression deformation.

[0028] Reference Figure 2 and Figure 3 The seal 3 is located on the surface of the inner frame 2 near the crankshaft. The surface of the seal 3 near the crankshaft has an arc surface 31, which is wavy. The seal 3 seals the crankshaft by tightly abutting the crankshaft through the arc surface 31.

[0029] Reference Figure 3 The inner frame 2 is L-shaped, and a lip 21 is fixedly connected to the end face of the inner frame 2 near the outer frame 1. The two ends of the lip 21 abut against the mutually perpendicular inner surfaces of the inner frame 2. The surface of the lip 21 that abuts against the inner frame 2 is wavy. The surface of the lip 21 away from the inner frame 2 is fixedly connected to the sealing element 3 on the end face of the outer frame 1 near the inner frame 2, and the lip 21 is bent towards the outer frame 1.

[0030] The implementation principle of Example 1 is as follows: the operator closely contacts the outer surface of the crankshaft with the wavy arc surface 31 opened on the outer surface of the crankshaft through the seal 3, so as to achieve the sealing of the oil seal on the oil inside the crankshaft.

[0031] Example 2 Reference Figure 3 and Figure 4 The difference between this embodiment and Embodiment 1 is that multiple limiting members 32 are fixedly connected to the surface of the seal 3 away from the crankshaft, and the multiple limiting members 32 are distributed in a circumferential array along the seal 3. The limiting members 32 are elastic and are configured as L-shaped.

[0032] Reference Figure 4The inner skeleton 2 has a limiting hole 22 on its surface near the sealing element 3 for the insertion of the limiting element 32. A first inclined surface 221 is formed on the hole walls on both opposite sides of the limiting hole 22. The distance from the first inclined surface 221 to the limiting element 32 gradually decreases along the direction in which the limiting element 32 is inserted into the limiting hole 22. The operator inserts the limiting element 32 into the limiting hole 22 along the inclined direction of the first inclined surface 221, so that the limiting element 32 abuts against the surface of the inner skeleton 2 near the lip 21.

[0033] Reference Figure 4 The limiting hole 22 has a groove 222 on its wall, which extends through the surface of the inner frame 2 near the lip 21. The groove 222 provides clearance for the limiting member 32 to unfold and reset. When the limiting member 32 is inserted into the groove 222, it can begin to unfold and reset, and the clearance provided by the groove 222 facilitates the unfolding and resetting of the limiting member 32.

[0034] Reference Figure 4 An elastic limiting block 211 is fixedly connected to the surface of the lip 21 near the limiting hole 22. The limiting member 32 is perpendicular to the surface of the inner frame 2 where the limiting hole 22 is formed. The limiting block 211 is located on the moving path of the limiting member 32. A second inclined surface 321 is formed on the end face of the limiting member 32. The distance from the second inclined surface 321 to the lip 21 gradually increases along the direction of the limiting member 32 near the axis of the inner frame 2. The second inclined surface 321 is used to guide the limiting block 211 to move to the surface of the limiting member 32 near the lip 21.

[0035] Reference Figure 4 When the limiting member 32 is inserted into the limiting hole 22, the limiting block 211 can move towards the lip 21 along the direction of the second inclined surface 321 until the limiting block 211 abuts against the surface of the limiting member 32 away from the crankshaft. At this time, the limiting block 211 is in a deformed state.

[0036] Reference Figure 4 A locking block 212 is fixedly connected to the surface of the lip 21 near the limiting hole 22. The locking block 212 abuts against the surface of the limiting block 211 near the axis of the inner skeleton 2. The locking block 212 can restrict the limiting block 211 from moving in the direction near the axis of the inner skeleton 2, so that the limiting block 211 abuts against the surface of the limiting member 32 near the lip 21.

[0037] Reference Figure 4 The limiting member 32 has friction texture 322 on its surface near the lip 21. The friction texture 322 is used to increase the friction force and reduce the possibility of the limiting block 211 detaching from the surface of the limiting member 32 near the lip 21, so that the limiting block 211 can fix the limiting member 32 more stably.

[0038] The implementation principle of Example 2 is as follows: When the worker installs a new seal 3, the worker first passes the limiting member 32 through the limiting hole 22 along the first inclined surface 221. The limiting member 32 begins to unfold and reset through the deformation space provided by the groove 222. Then, the second inclined surface 321 drives the limiting block 211 to move towards the lip 21 until the limiting block 211 abuts against the surface of the limiting member 32 near the lip 21. At this time, the limiting block 211 is in a deformed state. The worker fixes multiple limiting members 32 in the limiting hole 22 to realize the replacement of the seal 3 in the oil seal.

[0039] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art described herein. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. A high-performance oil seal, comprising an outer skeleton (1) and an inner skeleton (2), wherein the outer skeleton (1) is fixedly connected to the inner skeleton (2), the inner skeleton (2) abuts against a crankshaft, and both the outer skeleton (1) and the inner skeleton (2) are provided with sealing elements (3), and the inner skeleton (2) is provided with a lip (21), the lip (21) being fixedly connected to the sealing element (3) on the outer skeleton (1), characterized in that: The sealing element (3) has an arc surface (31) which is wavy. The sealing element (3) is provided with an elastic limiting element (32), and the inner skeleton (2) is provided with a limiting hole (22) for the limiting element (32) to be inserted; when the limiting element (32) is inserted into the limiting hole (22), the limiting element (32) abuts against the surface of the inner skeleton (2) near the lip (21).

2. The high-performance oil seal according to claim 1, characterized in that: The groove wall of the limiting hole (22) is provided with a first inclined surface (221). The distance from the first inclined surface (221) to the limiting member (32) gradually decreases along the direction in which the limiting member (32) is inserted into the limiting hole (22). The first inclined surface (221) is used to guide the limiting member (32) to be inserted into the limiting hole (22).

3. The high-performance oil seal according to claim 1, characterized in that: The limiting hole (22) has a groove (222) on its wall. The groove (222) extends through the surface of the inner skeleton (2) near the lip (21). The groove (222) is used to provide deformation space for the limiting member (32).

4. A high-performance oil seal according to claim 1, characterized in that: The lip (21) is provided with a limiting block (211), the limiting block (211) is elastic, and the limiting block (211) is located on the moving path of the limiting member (32); when the limiting member (32) is inserted into the limiting hole (22), the limiting block (211) abuts against the surface of the limiting member (32) away from the crankshaft, and the limiting block (211) is in a deformed state.

5. A high-performance oil seal according to claim 4, characterized in that: The lip (21) is provided with a locking block (212), which abuts against the surface of the limiting block (211) near the axis of the inner skeleton (2).

6. A high-performance oil seal according to claim 4, characterized in that: The limiting member (32) has a second inclined surface (321). The distance between the second inclined surface (321) and the lip (21) gradually increases along the direction of the limiting member (32) near the axis of the inner skeleton (2). The second inclined surface (321) is used to guide the limiting block (211) to move to the surface of the limiting member (32) near the lip (21).

7. A high-performance oil seal according to claim 4, characterized in that: The limiting member (32) has friction texture (322) on its surface near the lip (21), and the friction texture (322) is used to limit the movement of the limiting block (211).

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